Snapper is a powerful screen capturing utility for windows. Supporting different "targets" such as automatic FTP uploading and emailing, multiple capture modes and support for multiple monitors.
ZeroconfNetServices is a .NET wrapper for Zeroconfig / Bonjour! Networking / mDNS etc. User friendly API and fully documented.
ALAC is an Apple Lossless Audio Codec decoder. Having reversed engineered the format, available here is a free and entirely open source implementation of the codec.
Various old iTunes hacking stuff. This includes the old hack for circumventing iTunes DAAP security. Most of this stuff is now useless, since Apple has wised up on their security, but it remains here for the sake of history.
I currently do some work for Rogue Amoeba. I work on Airfoil for Windows and Airfoil Speakers for Windows and Linux. Check out these great network audio streaming products.